25349

Properties

Appears in sequences

• Numbers k such that the continued fraction for sqrt(k) has period 55.at n=37A020394
• Primes p such that there is no Carmichael number pqr, p<q<r q, r primes.at n=27A051663
• Triangle T(n,k) arising from enumeration of permutations with ordered orbits, read by rows (1<=k<=n).at n=39A059418
• Primes of the form 6n^2 - 1.at n=26A090686
• Sequence of Chen primes of the form (x*n+1)*(y*n+1)-2 in the order generated by A112229.at n=24A112230
• Smallest sequence of primes such that no sum of at least two terms is prime.at n=6A153136
• Number of -1..1 arrays x(i) of n+1 elements i=1..n+1 with x(i)+x(j), x(i+1)+x(j+1), -(x(i)+x(j+1)), and -(x(i+1)+x(j)) having one, two or three distinct values for every i<=n and j<=n.at n=9A211478
• Primes that remain prime when a single digit 3 is inserted between any two consecutive digits or as the leading or trailing digit.at n=26A215419
• Primes q = 4*p+1, where p == 2 (mod 5) is also prime.at n=40A221981
• Smallest prime p such that 2n+1 = 2p - q^3 for some odd prime q, or 0 if no such prime exists.at n=21A224794
• Primes p such that the sum of cubes of the 4 consecutive primes starting with p is twice a prime.at n=29A368637
• Primes that do not divide any 3-Carmichael numbers.at n=23A369777
• a(n) is the number of distinct triangles whose sides do not pass through a grid point and whose vertices are three points of an n X n grid.at n=31A372217
• Prime numbersat n=2796